Do not buy with your ears but with your eyes.
More Czech Proverbs:
A sweaty foot seldom comes alone.Czech
Extol the virtue of water, but drink wine.
Czech
If you wake up in the morning and feel no pain it is to be feared that you died in the night.
Czech
He who cannot cut the bread evenly cannot get on well with people.
Czech
Gentlemen don't want to give much and are ashamed to give little.
Czech
Do not choose your wife at a dance, but in the field among the harvesters.
Czech